First of all, it is a lot easier to discuss things on Plurk than on Twitter. Here, every Plurk has its own reply pane (while on Twitter)

on Twitter you reply to someone and he doesn't know what you're replying about. Also, Plurk has customizable themes and the timeline idea

is better than that of just list of entries. It is true that no one you know is on here, but: you can invite them here, and you can sent

*set Plurk to update your Twitter account as well with each of your Plurks.

Also, I think your Plurk wasn't instant because server experiences some problems. Usually it appears right away

You get access to all emoticons as you progress through Karma points.

Some emoticons you get as soon as you invite specific amount of friends

Some emoticons you get as soon as you invite specific amount of friends